Older Than deck / Inventions and everyday things
Geiger–Müller counter
First built
1928
Hans Geiger and Walther Müller’s detector that clicks for each particle of radiation.
Sources and checks
Checked 2026-11-01: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify, or content-verify-pdf for PDFs); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.
“Das Zählrohr wurde im Frühjahr 1928 von Walter Müller in Kiel entwickelt”Europa-Universität Flensburg — experimental history of science research project: source, retrieved 2026-10-28; quote re-found by the server check
“Im Jahr 1928 erfinden Hans Geiger und Walther Müller einen Detektor für radioaktive Strahlen.”Max Planck Institute for the History of Science — Einstein virtual exhibition, object lent by Deutsches Museum: source, retrieved 2026-10-28; quote re-found by the server check
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